Übersetzung und Analyse von Wörtern durch künstliche Intelligenz ChatGPT
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block of data - Übersetzung nach russisch
![The development of the [[boomerang attack]] enabled [[differential cryptanalysis]] techniques to be applied to many ciphers that had previously been deemed secure against differential attacks](https://commons.wikimedia.org/wiki/Special:FilePath/Attaque boomerang.png?width=200 "The development of the [[boomerang attack]] enabled [[differential cryptanalysis]] techniques to be applied to many ciphers that had previously been deemed secure against differential attacks")
![Many block ciphers, such as DES and Blowfish utilize structures known as ''[[Feistel cipher]]s''](https://commons.wikimedia.org/wiki/Special:FilePath/Feistel cipher diagram en.svg?width=200 "Many block ciphers, such as DES and Blowfish utilize structures known as ''[[Feistel cipher]]s''")
![IDEA]].](https://commons.wikimedia.org/wiki/Special:FilePath/Lai Massey scheme diagram en.svg?width=200 "IDEA]].")
![Insecure encryption of an image as a result of [[electronic codebook]] (ECB) mode encoding.](https://commons.wikimedia.org/wiki/Special:FilePath/Tux ecb.jpg?width=200 "Insecure encryption of an image as a result of [[electronic codebook]] (ECB) mode encoding.")
Definition
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Wikipedia
In computing (specifically data transmission and data storage), a block, sometimes called a physical record, is a sequence of bytes or bits, usually containing some whole number of records, having a maximum length; a block size. Data thus structured are said to be blocked. The process of putting data into blocks is called blocking, while deblocking is the process of extracting data from blocks. Blocked data is normally stored in a data buffer, and read or written a whole block at a time. Blocking reduces the overhead and speeds up the handling of the data stream. For some devices, such as magnetic tape and CKD disk devices, blocking reduces the amount of external storage required for the data. Blocking is almost universally employed when storing data to 9-track magnetic tape, NAND flash memory, and rotating media such as floppy disks, hard disks, and optical discs.
Most file systems are based on a block device, which is a level of abstraction for the hardware responsible for storing and retrieving specified blocks of data, though the block size in file systems may be a multiple of the physical block size. This leads to space inefficiency due to internal fragmentation, since file lengths are often not integer multiples of block size, and thus the last block of a file may remain partially empty. This will create slack space. Some newer file systems, such as Btrfs and FreeBSD UFS2, attempt to solve this through techniques called block suballocation and tail merging. Other file systems such as ZFS support variable block sizes.
Block storage is normally abstracted by a file system or database management system (DBMS) for use by applications and end users. The physical or logical volumes accessed via block I/O may be devices internal to a server, directly attached via SCSI or Fibre Channel, or distant devices accessed via a storage area network (SAN) using a protocol such as iSCSI, or AoE. DBMSes often use their own block I/O for improved performance and recoverability as compared to layering the DBMS on top of a file system.
